From patchwork Thu Jun 9 14:54:37 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Simon Wunderlich X-Patchwork-Id: 16346 X-Patchwork-Delegate: mareklindner@neomailbox.ch Return-Path: X-Original-To: patchwork@open-mesh.org Delivered-To: patchwork@open-mesh.org Received: from open-mesh.org (localhost [IPv6:::1]) by open-mesh.org (Postfix) with ESMTP id BF49381D25; Thu, 9 Jun 2016 16:56:37 +0200 (CEST) Authentication-Results: open-mesh.org; dmarc=none header.from=simonwunderlich.de Received-SPF: Pass (sender SPF authorized) identity=mailfrom; client-ip=2001:4d88:2000:24::c0de; helo=mail.mail.packetmixer.de; envelope-from=sw@simonwunderlich.de; receiver=b.a.t.m.a.n@lists.open-mesh.org Authentication-Results: open-mesh.org; dmarc=none header.from=simonwunderlich.de Received: from mail.mail.packetmixer.de (packetmixer.de [IPv6:2001:4d88:2000:24::c0de]) by open-mesh.org (Postfix) with ESMTPS id 2E13E81CF0 for ; Thu, 9 Jun 2016 16:55:02 +0200 (CEST) Received: from kero.packetmixer.de (p2003007C6F7E2400527B9DFFFECE2EDC.dip0.t-ipconnect.de [IPv6:2003:7c:6f7e:2400:527b:9dff:fece:2edc]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.mail.packetmixer.de (Postfix) with ESMTPSA id 0083C174001; Thu, 9 Jun 2016 16:54:55 +0200 (CEST) From: Simon Wunderlich To: b.a.t.m.a.n@lists.open-mesh.org Date: Thu, 9 Jun 2016 16:54:37 +0200 Message-Id: <1465484086-7974-6-git-send-email-sw@simonwunderlich.de> X-Mailer: git-send-email 2.8.1 In-Reply-To: <1465484086-7974-1-git-send-email-sw@simonwunderlich.de> References: <1465484086-7974-1-git-send-email-sw@simonwunderlich.de> Cc: Sven Eckelmann Subject: [B.A.T.M.A.N.] [PATCH v9 05/14] batman-adv: netlink: add translation table query X-BeenThere: b.a.t.m.a.n@lists.open-mesh.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: The list for a Better Approach To Mobile Ad-hoc Networking List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Reply-To: The list for a Better Approach To Mobile Ad-hoc Networking Errors-To: b.a.t.m.a.n-bounces@lists.open-mesh.org Sender: "B.A.T.M.A.N" From: Matthias Schiffer This adds the commands BATADV_CMD_GET_TRANSTABLE_LOCAL and BATADV_CMD_GET_TRANSTABLE_GLOBAL, which correspond to the transtable_local and transtable_global debugfs files. The batadv_tt_client_flags enum is moved to the UAPI to expose it as part of the netlink API. Signed-off-by: Matthias Schiffer Signed-off-by: Andrew Lunn [sven.eckelmann@open-mesh.com: add policy for attributes, fix includes] Signed-off-by: Sven Eckelmann [sw@simonwunderlich.de: fix VID attributes content] Signed-off-by: Simon Wunderlich --- include/uapi/linux/batman_adv.h | 56 ++++++ net/batman-adv/netlink.c | 23 ++- net/batman-adv/netlink.h | 3 + net/batman-adv/packet.h | 36 ---- net/batman-adv/translation-table.c | 377 +++++++++++++++++++++++++++++++++++++ net/batman-adv/translation-table.h | 4 + 6 files changed, 462 insertions(+), 37 deletions(-) diff --git a/include/uapi/linux/batman_adv.h b/include/uapi/linux/batman_adv.h index 9ac9080..1dbb321 100644 --- a/include/uapi/linux/batman_adv.h +++ b/include/uapi/linux/batman_adv.h @@ -23,6 +23,42 @@ #define BATADV_NL_MCAST_GROUP_TPMETER "tpmeter" /** + * enum batadv_tt_client_flags - TT client specific flags + * @BATADV_TT_CLIENT_DEL: the client has to be deleted from the table + * @BATADV_TT_CLIENT_ROAM: the client roamed to/from another node and the new + * update telling its new real location has not been received/sent yet + * @BATADV_TT_CLIENT_WIFI: this client is connected through a wifi interface. + * This information is used by the "AP Isolation" feature + * @BATADV_TT_CLIENT_ISOLA: this client is considered "isolated". This + * information is used by the Extended Isolation feature + * @BATADV_TT_CLIENT_NOPURGE: this client should never be removed from the table + * @BATADV_TT_CLIENT_NEW: this client has been added to the local table but has + * not been announced yet + * @BATADV_TT_CLIENT_PENDING: this client is marked for removal but it is kept + * in the table for one more originator interval for consistency purposes + * @BATADV_TT_CLIENT_TEMP: this global client has been detected to be part of + * the network but no nnode has already announced it + * + * Bits from 0 to 7 are called _remote flags_ because they are sent on the wire. + * Bits from 8 to 15 are called _local flags_ because they are used for local + * computations only. + * + * Bits from 4 to 7 - a subset of remote flags - are ensured to be in sync with + * the other nodes in the network. To achieve this goal these flags are included + * in the TT CRC computation. + */ +enum batadv_tt_client_flags { + BATADV_TT_CLIENT_DEL = (1 << 0), + BATADV_TT_CLIENT_ROAM = (1 << 1), + BATADV_TT_CLIENT_WIFI = (1 << 4), + BATADV_TT_CLIENT_ISOLA = (1 << 5), + BATADV_TT_CLIENT_NOPURGE = (1 << 8), + BATADV_TT_CLIENT_NEW = (1 << 9), + BATADV_TT_CLIENT_PENDING = (1 << 10), + BATADV_TT_CLIENT_TEMP = (1 << 11), +}; + +/** * enum batadv_nl_attrs - batman-adv netlink attributes * * @BATADV_ATTR_UNSPEC: unspecified attribute to catch errors @@ -41,6 +77,14 @@ * @BATADV_ATTR_TPMETER_COOKIE: session cookie to match tp_meter session * @BATADV_ATTR_PAD: attribute used for padding for 64-bit alignment * @BATADV_ATTR_ACTIVE: Flag indicating if the hard interface is active + * @BATADV_ATTR_TT_ADDRESS: Client MAC address + * @BATADV_ATTR_TT_TTVN: Translation table version + * @BATADV_ATTR_TT_LAST_TTVN: Previous translation table version + * @BATADV_ATTR_TT_CRC32: CRC32 over translation table + * @BATADV_ATTR_TT_VID: VLAN ID + * @BATADV_ATTR_TT_FLAGS: Translation table client flags + * @BATADV_ATTR_FLAG_BEST: Flags indicating entry is the best + * @BATADV_ATTR_LAST_SEEN_MSECS: Time in milliseconds since last seen * @__BATADV_ATTR_AFTER_LAST: internal use * @NUM_BATADV_ATTR: total number of batadv_nl_attrs available * @BATADV_ATTR_MAX: highest attribute number currently defined @@ -62,6 +106,14 @@ enum batadv_nl_attrs { BATADV_ATTR_TPMETER_COOKIE, BATADV_ATTR_PAD, BATADV_ATTR_ACTIVE, + BATADV_ATTR_TT_ADDRESS, + BATADV_ATTR_TT_TTVN, + BATADV_ATTR_TT_LAST_TTVN, + BATADV_ATTR_TT_CRC32, + BATADV_ATTR_TT_VID, + BATADV_ATTR_TT_FLAGS, + BATADV_ATTR_FLAG_BEST, + BATADV_ATTR_LAST_SEEN_MSECS, /* add attributes above here, update the policy in netlink.c */ __BATADV_ATTR_AFTER_LAST, NUM_BATADV_ATTR = __BATADV_ATTR_AFTER_LAST, @@ -77,6 +129,8 @@ enum batadv_nl_attrs { * @BATADV_CMD_TP_METER_CANCEL: Cancel a tp meter session * @BATADV_CMD_GET_ROUTING_ALGOS: Query the list of routing algorithms. * @BATADV_CMD_GET_HARDIFS: Query list of hard interfaces + * @BATADV_CMD_GET_TRANSTABLE_LOCAL: Query list of local translations + * @BATADV_CMD_GET_TRANSTABLE_GLOBAL Query list of global translations * @__BATADV_CMD_AFTER_LAST: internal use * @BATADV_CMD_MAX: highest used command number */ @@ -87,6 +141,8 @@ enum batadv_nl_commands { BATADV_CMD_TP_METER_CANCEL, BATADV_CMD_GET_ROUTING_ALGOS, BATADV_CMD_GET_HARDIFS, + BATADV_CMD_GET_TRANSTABLE_LOCAL, + BATADV_CMD_GET_TRANSTABLE_GLOBAL, /* add new commands above here */ __BATADV_CMD_AFTER_LAST, BATADV_CMD_MAX = __BATADV_CMD_AFTER_LAST - 1 diff --git a/net/batman-adv/netlink.c b/net/batman-adv/netlink.c index 3f872d6..14360ec 100644 --- a/net/batman-adv/netlink.c +++ b/net/batman-adv/netlink.c @@ -40,6 +40,7 @@ #include "hard-interface.h" #include "soft-interface.h" #include "tp_meter.h" +#include "translation-table.h" struct genl_family batadv_netlink_family = { .id = GENL_ID_GENERATE, @@ -73,6 +74,14 @@ static struct nla_policy batadv_netlink_policy[NUM_BATADV_ATTR] = { [BATADV_ATTR_TPMETER_BYTES] = { .type = NLA_U64 }, [BATADV_ATTR_TPMETER_COOKIE] = { .type = NLA_U32 }, [BATADV_ATTR_ACTIVE] = { .type = NLA_FLAG }, + [BATADV_ATTR_TT_ADDRESS] = { .len = ETH_ALEN }, + [BATADV_ATTR_TT_TTVN] = { .type = NLA_U8 }, + [BATADV_ATTR_TT_LAST_TTVN] = { .type = NLA_U8 }, + [BATADV_ATTR_TT_CRC32] = { .type = NLA_U32 }, + [BATADV_ATTR_TT_VID] = { .type = NLA_U16 }, + [BATADV_ATTR_TT_FLAGS] = { .type = NLA_U32 }, + [BATADV_ATTR_FLAG_BEST] = { .type = NLA_FLAG }, + [BATADV_ATTR_LAST_SEEN_MSECS] = { .type = NLA_U32 }, }; /** @@ -82,7 +91,7 @@ static struct nla_policy batadv_netlink_policy[NUM_BATADV_ATTR] = { * * Return: interface index, or 0. */ -static int +int batadv_netlink_get_ifindex(const struct nlmsghdr *nlh, int attrtype) { struct nlattr *attr = nlmsg_find_attr(nlh, GENL_HDRLEN, attrtype); @@ -530,6 +539,18 @@ static struct genl_ops batadv_netlink_ops[] = { .policy = batadv_netlink_policy, .dumpit = batadv_netlink_dump_hardifs, }, + { + .cmd = BATADV_CMD_GET_TRANSTABLE_LOCAL, + .flags = GENL_ADMIN_PERM, + .policy = batadv_netlink_policy, + .dumpit = batadv_tt_local_dump, + }, + { + .cmd = BATADV_CMD_GET_TRANSTABLE_GLOBAL, + .flags = GENL_ADMIN_PERM, + .policy = batadv_netlink_policy, + .dumpit = batadv_tt_global_dump, + }, }; /** diff --git a/net/batman-adv/netlink.h b/net/batman-adv/netlink.h index b399f49..52eb162 100644 --- a/net/batman-adv/netlink.h +++ b/net/batman-adv/netlink.h @@ -23,8 +23,11 @@ #include #include +struct nlmsghdr; + void batadv_netlink_register(void); void batadv_netlink_unregister(void); +int batadv_netlink_get_ifindex(const struct nlmsghdr *nlh, int attrtype); int batadv_netlink_tpmeter_notify(struct batadv_priv *bat_priv, const u8 *dst, u8 result, u32 test_time, u64 total_bytes, diff --git a/net/batman-adv/packet.h b/net/batman-adv/packet.h index 6b011ff..6afc0b8 100644 --- a/net/batman-adv/packet.h +++ b/net/batman-adv/packet.h @@ -129,42 +129,6 @@ enum batadv_tt_data_flags { }; /** - * enum batadv_tt_client_flags - TT client specific flags - * @BATADV_TT_CLIENT_DEL: the client has to be deleted from the table - * @BATADV_TT_CLIENT_ROAM: the client roamed to/from another node and the new - * update telling its new real location has not been received/sent yet - * @BATADV_TT_CLIENT_WIFI: this client is connected through a wifi interface. - * This information is used by the "AP Isolation" feature - * @BATADV_TT_CLIENT_ISOLA: this client is considered "isolated". This - * information is used by the Extended Isolation feature - * @BATADV_TT_CLIENT_NOPURGE: this client should never be removed from the table - * @BATADV_TT_CLIENT_NEW: this client has been added to the local table but has - * not been announced yet - * @BATADV_TT_CLIENT_PENDING: this client is marked for removal but it is kept - * in the table for one more originator interval for consistency purposes - * @BATADV_TT_CLIENT_TEMP: this global client has been detected to be part of - * the network but no nnode has already announced it - * - * Bits from 0 to 7 are called _remote flags_ because they are sent on the wire. - * Bits from 8 to 15 are called _local flags_ because they are used for local - * computations only. - * - * Bits from 4 to 7 - a subset of remote flags - are ensured to be in sync with - * the other nodes in the network. To achieve this goal these flags are included - * in the TT CRC computation. - */ -enum batadv_tt_client_flags { - BATADV_TT_CLIENT_DEL = BIT(0), - BATADV_TT_CLIENT_ROAM = BIT(1), - BATADV_TT_CLIENT_WIFI = BIT(4), - BATADV_TT_CLIENT_ISOLA = BIT(5), - BATADV_TT_CLIENT_NOPURGE = BIT(8), - BATADV_TT_CLIENT_NEW = BIT(9), - BATADV_TT_CLIENT_PENDING = BIT(10), - BATADV_TT_CLIENT_TEMP = BIT(11), -}; - -/** * enum batadv_vlan_flags - flags for the four MSB of any vlan ID field * @BATADV_VLAN_HAS_TAG: whether the field contains a valid vlan tag or not */ diff --git a/net/batman-adv/translation-table.c b/net/batman-adv/translation-table.c index 3c32f5f..84ae94d 100644 --- a/net/batman-adv/translation-table.c +++ b/net/batman-adv/translation-table.c @@ -35,20 +35,27 @@ #include #include #include +#include #include #include #include +#include #include #include #include #include #include +#include +#include +#include +#include #include "bridge_loop_avoidance.h" #include "hard-interface.h" #include "hash.h" #include "log.h" #include "multicast.h" +#include "netlink.h" #include "originator.h" #include "packet.h" #include "soft-interface.h" @@ -1057,6 +1064,164 @@ out: return 0; } +/** + * batadv_tt_local_dump_entry - Dump one TT local entry into a message + * @msg :Netlink message to dump into + * @portid: Port making netlink request + * @seq: Sequence number of netlink message + * @bat_priv: The bat priv with all the soft interface information + * @common: tt local & tt global common data + * + * Return: Error code, or 0 on success + */ +static int +batadv_tt_local_dump_entry(struct sk_buff *msg, u32 portid, u32 seq, + struct batadv_priv *bat_priv, + struct batadv_tt_common_entry *common) +{ + void *hdr; + struct batadv_softif_vlan *vlan; + struct batadv_tt_local_entry *local; + unsigned int last_seen_msecs; + u32 crc; + + local = container_of(common, struct batadv_tt_local_entry, common); + last_seen_msecs = jiffies_to_msecs(jiffies - local->last_seen); + + vlan = batadv_softif_vlan_get(bat_priv, common->vid); + if (!vlan) + return 0; + + crc = vlan->tt.crc; + + batadv_softif_vlan_put(vlan); + + hdr = genlmsg_put(msg, portid, seq, &batadv_netlink_family, + NLM_F_MULTI, + BATADV_CMD_GET_TRANSTABLE_LOCAL); + if (!hdr) + return -ENOBUFS; + + if (nla_put(msg, BATADV_ATTR_TT_ADDRESS, ETH_ALEN, common->addr) || + nla_put_u32(msg, BATADV_ATTR_TT_CRC32, crc) || + nla_put_u16(msg, BATADV_ATTR_TT_VID, common->vid) || + nla_put_u32(msg, BATADV_ATTR_TT_FLAGS, common->flags)) + goto nla_put_failure; + + if (!(common->flags & BATADV_TT_CLIENT_NOPURGE) && + nla_put_u32(msg, BATADV_ATTR_LAST_SEEN_MSECS, last_seen_msecs)) + goto nla_put_failure; + + genlmsg_end(msg, hdr); + return 0; + + nla_put_failure: + genlmsg_cancel(msg, hdr); + return -EMSGSIZE; +} + +/** + * batadv_tt_local_dump_bucket - Dump one TT local bucket into a message + * @msg: Netlink message to dump into + * @portid: Port making netlink request + * @seq: Sequence number of netlink message + * @bat_priv: The bat priv with all the soft interface information + * @head: Pointer to the list containing the local tt entries + * @idx_s: Number of entries to skip + * + * Return: Error code, or 0 on success + */ +static int +batadv_tt_local_dump_bucket(struct sk_buff *msg, u32 portid, u32 seq, + struct batadv_priv *bat_priv, + struct hlist_head *head, int *idx_s) +{ + struct batadv_tt_common_entry *common; + int idx = 0; + + rcu_read_lock(); + hlist_for_each_entry_rcu(common, head, hash_entry) { + if (idx++ < *idx_s) + continue; + + if (batadv_tt_local_dump_entry(msg, portid, seq, bat_priv, + common)) { + rcu_read_unlock(); + *idx_s = idx - 1; + return -EMSGSIZE; + } + } + rcu_read_unlock(); + + *idx_s = 0; + return 0; +} + +/** + * batadv_tt_local_dump - Dump TT local entries into a message + * @msg: Netlink message to dump into + * @cb: Parameters from query + * + * Return: Error code, or 0 on success + */ +int batadv_tt_local_dump(struct sk_buff *msg, struct netlink_callback *cb) +{ + struct net *net = sock_net(cb->skb->sk); + struct net_device *soft_iface; + struct batadv_priv *bat_priv; + struct batadv_hard_iface *primary_if = NULL; + struct batadv_hashtable *hash; + struct hlist_head *head; + int ret; + int ifindex; + int bucket = cb->args[0]; + int idx = cb->args[1]; + int portid = NETLINK_CB(cb->skb).portid; + + ifindex = batadv_netlink_get_ifindex(cb->nlh, BATADV_ATTR_MESH_IFINDEX); + if (!ifindex) + return -EINVAL; + + soft_iface = dev_get_by_index(net, ifindex); + if (!soft_iface || !batadv_softif_is_valid(soft_iface)) { + ret = -ENODEV; + goto out; + } + + bat_priv = netdev_priv(soft_iface); + + primary_if = batadv_primary_if_get_selected(bat_priv); + if (!primary_if || primary_if->if_status != BATADV_IF_ACTIVE) { + ret = -ENOENT; + goto out; + } + + hash = bat_priv->tt.local_hash; + + while (bucket < hash->size) { + head = &hash->table[bucket]; + + if (batadv_tt_local_dump_bucket(msg, portid, cb->nlh->nlmsg_seq, + bat_priv, head, &idx)) + break; + + bucket++; + } + + ret = msg->len; + + out: + if (primary_if) + batadv_hardif_put(primary_if); + if (soft_iface) + dev_put(soft_iface); + + cb->args[0] = bucket; + cb->args[1] = idx; + + return ret; +} + static void batadv_tt_local_set_pending(struct batadv_priv *bat_priv, struct batadv_tt_local_entry *tt_local_entry, @@ -1704,6 +1869,218 @@ out: } /** + * batadv_tt_global_dump_subentry - Dump all TT local entries into a message + * @msg: Netlink message to dump into + * @portid: Port making netlink request + * @seq: Sequence number of netlink message + * @common: tt local & tt global common data + * @orig: Originator node announcing a non-mesh client + * @best: Is the best originator for the TT entry + * + * Return: Error code, or 0 on success + */ +static int +batadv_tt_global_dump_subentry(struct sk_buff *msg, u32 portid, u32 seq, + struct batadv_tt_common_entry *common, + struct batadv_tt_orig_list_entry *orig, + bool best) +{ + void *hdr; + struct batadv_orig_node_vlan *vlan; + u8 last_ttvn; + u32 crc; + + vlan = batadv_orig_node_vlan_get(orig->orig_node, + common->vid); + if (!vlan) + return 0; + + crc = vlan->tt.crc; + + batadv_orig_node_vlan_put(vlan); + + hdr = genlmsg_put(msg, portid, seq, &batadv_netlink_family, + NLM_F_MULTI, + BATADV_CMD_GET_TRANSTABLE_GLOBAL); + if (!hdr) + return -ENOBUFS; + + last_ttvn = atomic_read(&orig->orig_node->last_ttvn); + + if (nla_put(msg, BATADV_ATTR_TT_ADDRESS, ETH_ALEN, common->addr) || + nla_put(msg, BATADV_ATTR_ORIG_ADDRESS, ETH_ALEN, + orig->orig_node->orig) || + nla_put_u8(msg, BATADV_ATTR_TT_TTVN, orig->ttvn) || + nla_put_u8(msg, BATADV_ATTR_TT_LAST_TTVN, last_ttvn) || + nla_put_u32(msg, BATADV_ATTR_TT_CRC32, crc) || + nla_put_u16(msg, BATADV_ATTR_TT_VID, common->vid) || + nla_put_u32(msg, BATADV_ATTR_TT_FLAGS, common->flags)) + goto nla_put_failure; + + if (best && nla_put_flag(msg, BATADV_ATTR_FLAG_BEST)) + goto nla_put_failure; + + genlmsg_end(msg, hdr); + return 0; + + nla_put_failure: + genlmsg_cancel(msg, hdr); + return -EMSGSIZE; +} + +/** + * batadv_tt_global_dump_entry - Dump one TT global entry into a message + * @msg: Netlink message to dump into + * @portid: Port making netlink request + * @seq: Sequence number of netlink message + * @bat_priv: The bat priv with all the soft interface information + * @common: tt local & tt global common data + * @sub_s: Number of entries to skip + * + * This function assumes the caller holds rcu_read_lock(). + * + * Return: Error code, or 0 on success + */ +static int +batadv_tt_global_dump_entry(struct sk_buff *msg, u32 portid, u32 seq, + struct batadv_priv *bat_priv, + struct batadv_tt_common_entry *common, int *sub_s) +{ + struct batadv_tt_orig_list_entry *orig_entry, *best_entry; + struct batadv_tt_global_entry *global; + struct hlist_head *head; + int sub = 0; + bool best; + + global = container_of(common, struct batadv_tt_global_entry, common); + best_entry = batadv_transtable_best_orig(bat_priv, global); + head = &global->orig_list; + + hlist_for_each_entry_rcu(orig_entry, head, list) { + if (sub++ < *sub_s) + continue; + + best = (orig_entry == best_entry); + + if (batadv_tt_global_dump_subentry(msg, portid, seq, common, + orig_entry, best)) { + *sub_s = sub - 1; + return -EMSGSIZE; + } + } + + *sub_s = 0; + return 0; +} + +/** + * batadv_tt_global_dump_bucket - Dump one TT local bucket into a message + * @msg: Netlink message to dump into + * @portid: Port making netlink request + * @seq: Sequence number of netlink message + * @bat_priv: The bat priv with all the soft interface information + * @head: Pointer to the list containing the global tt entries + * @idx_s: Number of entries to skip + * @sub: Number of entries to skip + * + * Return: Error code, or 0 on success + */ +static int +batadv_tt_global_dump_bucket(struct sk_buff *msg, u32 portid, u32 seq, + struct batadv_priv *bat_priv, + struct hlist_head *head, int *idx_s, int *sub) +{ + struct batadv_tt_common_entry *common; + int idx = 0; + + rcu_read_lock(); + hlist_for_each_entry_rcu(common, head, hash_entry) { + if (idx++ < *idx_s) + continue; + + if (batadv_tt_global_dump_entry(msg, portid, seq, bat_priv, + common, sub)) { + rcu_read_unlock(); + *idx_s = idx - 1; + return -EMSGSIZE; + } + } + rcu_read_unlock(); + + *idx_s = 0; + *sub = 0; + return 0; +} + +/** + * batadv_tt_global_dump - Dump TT global entries into a message + * @msg: Netlink message to dump into + * @cb: Parameters from query + * + * Return: Error code, or length of message on success + */ +int batadv_tt_global_dump(struct sk_buff *msg, struct netlink_callback *cb) +{ + struct net *net = sock_net(cb->skb->sk); + struct net_device *soft_iface; + struct batadv_priv *bat_priv; + struct batadv_hard_iface *primary_if = NULL; + struct batadv_hashtable *hash; + struct hlist_head *head; + int ret; + int ifindex; + int bucket = cb->args[0]; + int idx = cb->args[1]; + int sub = cb->args[2]; + int portid = NETLINK_CB(cb->skb).portid; + + ifindex = batadv_netlink_get_ifindex(cb->nlh, BATADV_ATTR_MESH_IFINDEX); + if (!ifindex) + return -EINVAL; + + soft_iface = dev_get_by_index(net, ifindex); + if (!soft_iface || !batadv_softif_is_valid(soft_iface)) { + ret = -ENODEV; + goto out; + } + + bat_priv = netdev_priv(soft_iface); + + primary_if = batadv_primary_if_get_selected(bat_priv); + if (!primary_if || primary_if->if_status != BATADV_IF_ACTIVE) { + ret = -ENOENT; + goto out; + } + + hash = bat_priv->tt.global_hash; + + while (bucket < hash->size) { + head = &hash->table[bucket]; + + if (batadv_tt_global_dump_bucket(msg, portid, + cb->nlh->nlmsg_seq, bat_priv, + head, &idx, &sub)) + break; + + bucket++; + } + + ret = msg->len; + + out: + if (primary_if) + batadv_hardif_put(primary_if); + if (soft_iface) + dev_put(soft_iface); + + cb->args[0] = bucket; + cb->args[1] = idx; + cb->args[2] = sub; + + return ret; +} + +/** * _batadv_tt_global_del_orig_entry - remove and free an orig_entry * @tt_global_entry: the global entry to remove the orig_entry from * @orig_entry: the orig entry to remove and free diff --git a/net/batman-adv/translation-table.h b/net/batman-adv/translation-table.h index 7c7e2c0..4697af6 100644 --- a/net/batman-adv/translation-table.h +++ b/net/batman-adv/translation-table.h @@ -22,8 +22,10 @@ #include +struct netlink_callback; struct net_device; struct seq_file; +struct sk_buff; int batadv_tt_init(struct batadv_priv *bat_priv); bool batadv_tt_local_add(struct net_device *soft_iface, const u8 *addr, @@ -33,6 +35,8 @@ u16 batadv_tt_local_remove(struct batadv_priv *bat_priv, const char *message, bool roaming); int batadv_tt_local_seq_print_text(struct seq_file *seq, void *offset); int batadv_tt_global_seq_print_text(struct seq_file *seq, void *offset); +int batadv_tt_local_dump(struct sk_buff *msg, struct netlink_callback *cb); +int batadv_tt_global_dump(struct sk_buff *msg, struct netlink_callback *cb); void batadv_tt_global_del_orig(struct batadv_priv *bat_priv, struct batadv_orig_node *orig_node, s32 match_vid, const char *message);